Labels:text | screenshot | font OCR: The 29 cases of water formation described on this page demonstrate Leonardo's search for principles for his science of water. He acknowledges that weirs may create problems: "How the impetus of rivers can be controlled by frequent weirs and dams; but this is not useful to the neighbors, because the waters often overflow to inundate their land." A He also recognizes how to mitigate adverse consequences: "The whirling of the waters reunited after the object which had divided them will circle back toward the percussed
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